Hi...You say you haven't lost much...how much is not that much? Also, you should add some exercise, a little goes a long way at first. That will get your weight loss moving.
The band is just a "tool", it is not a miracle cure...I have had my band for 4 yrs as of March 27th. It has been a journey and will continue to be. I have gone over a year without a fill and had it wide open...gained ten pounds and started over several times...It has only been 4 months for you...if you lost at least 15 lbs in 4 months, I would say it is not a mistake. If you know that you are really truely not eating the way you should (honestly) then rethink your stratagies...you will find out what works and what doesn't. I was drinking grande white choco mochas and when I wasn't losing, it was a sad realization of what I had to do...as soon as I quit drinking them I dropped 15lbs in a month....changing nothing else.
Watching what you eat is important, just as important if not more is WHAT you drink. Without knowing what you are in fact eating or drinking it is hard to tell...Lattes and Mochas super high calories and fat...carbonated drinks...and Protein drinks with xtra carbs or milk. Read the labels, on foods as if you didn't have the band...I stick with as much straight up protien foods as possible, low low carbs, low low sugar...Lots of Water...Green Tea...I kinda follow an Atkins type diet, and quit eating before you feel full.
You want to eat foods that can sit in your pouch a little longer. ...and you will stay fuller longer, so you don't want to snack between meals. You will find that your body will tell you when you are done, before your brain will tell you.. With the band you may have little hiccups or subtle little twinges...if you quit eating for 15minutes you will find you are full and don't need another bite. Do you have support groups in your area? Definitely go...you can address all your concerns and meet people with the same concerns and issues and get good ideas...
I think you made the right decision if you are in the same boat in a year...then I would worry..it is all trial and error right now...Good Luck!!